Rheostat.



PAUL E. ZIMMER, OF .SCHENECDY NEW YORK, SSIGNOR- TO GENERAL ELECT?.

" L GORP-GRAT No. eeeee.

To ali whom it wiay come?v Be it known thas PAUL H. Zminme, citizene the Unied Stees, iesiding at Sehenectey, 'County of Seheneetey, Siete of New 'ii/verk; have inveiied Certain new and useful mprevemens in Eheosas, of which the following is a speeieetion.

his invention rei-etes $0 for een` trolling eeeiie cireuics has for iis o`o "ect the revision 0i' a device of this cherspringpressed or. biased o an iuiie posiion, a membei' which is pivezeo. eeneeil'rie ally Wizh seid erm. member is .mounted te move iidepeiidenty.0f-seid arm but has en engagement theses/ith suiieiene ie oveeome the spring fensi'on 021 "che emu-se he uigiess hemember is it will move with the aim. also govide a de'ent e iroiied by the nei-voltage magnet emi s genge the parts that when fee magies i elgizet, the detent will me and hold' isb so that the @im Wii be mov respect to *ehe member and wi any position thereby, Upea. .s inge the zum Wil retum to the simon and eeliy the nie-rebel" Wi n "bhe aecempanying drm/ii have shown my invention emfoe crete mechanism, Figzue l is e. View of the seme shewiig iiue emengemeoi o cuits and ig. 2 is en dev-zien of ie ating meeiieiiism.

Refeiing e lle rewing, i0 is e .bese e some. insulaiig meizeiini, auch es siete e soepstene, provided. Wish s. sei'ies oif eenige' studs l1 eifenged in the ere eeiicie foiming theseimmes ei resisenee 3.2.

contzoiing erm i3 is piveed et emi erien'ged se ibut its fiee en@ siecle 1l to vary 4he resist-ence. arm is .e .s

i0 im inisiei position inse he by means 01" a spring i6. meme-ete l in he fo'm of e fiskyproviciel with is mounted eoncentleehy with This reiche?, disk is mounted te move Epecieeon of etent.

QF NEW YORK..

Patented Jim@ E5, 1960.

upon he pivot iii, emi thus has a movement independent 01' the afm. n meente siide in e b1 ckeon the under side of the erm 13 and is spriug-piessed into engagement 1. -di the teeth ef disk 17. This @euses e yieiding engagement between he erm and the disk which'is suiicient to ever come 'the tension the spying l so that neimey erm and disk. would .move togethei'. iiewof qe megner, 19 having en e'rmeure 20 piveed se 2l is so ersngeoi as 'so ioii the disk l? in e rigid er immovable position when the magnet is energiseci. This 1s accomplished by means of a detent Censisiiegoi' a pewl el* eoth 22 upon the ermetuie 2G engagiigf he aeeh of the disk.

The ement of eireuis and mode of epere'ioii are es oews: Y.727hen 'die Eile swieu 23 is closed the iio-Veiage mfigne 19,

which is connected across the line, 1s energized and the rieten' on armature 20 enffages me Leetiief the'etehet disk. l? .smi he ds it immevaoie. The erm Wiil then be moved becken forii over 'Lhestuds l1 so as vto vwy the i'esisenee in the eiio'uii; of mme# ture A. Bering tb." mevemenb the arm' moves over the eeliet disk i? e lie pew). slips wel th eeth t i The erm n5' thus oe Eef@ in esiife position. eef.' Voie l disk wil be'ie- 85 enf?. t ie'izim mi to the initial ese. if, invention in -ieiee iiecienisiii spessi shmiid be unfie- 9" y invee'bioilthereis iim'te by @he seimay izievebie eiewiii, 190

.Je niegue ns Connell@ and. mea s L. hmmm fixed as the arm ratchets over the same to vary the resistance.

3. A rheostat comprising a series of convtaets, av pivoted controlling arm therefor having a bias to an initial position, a ratchet disk mounted eoncentrieally and movable intacts, a controlling arm t erefor having a bias to an 1n1t1al ositlon, a. member mount-v ed for movement ndependently of said arm but normally movable therewith, a no-voll tage magnet, and means controlled thereby for holding said member fixed as the arm is moved With reference thereto and held in any position thereby.

A rheostat comprisinga series of contacte, a controlling arm therefor having a bias to an initial position, a member mounted independently of said arm and having a yielding engagement therewith sufficient to overcome the bias, a no-voltage magnet, and means controlled thereby for holding said member fixed as the arm is moved with reference thereto. v

In Witness whereof, I have hereunto set my-hand this third day of April, 1908.

. l PAU L H. ZMMER. Vitnesses -HELEN ORFORD,

FRANK J. DORE. 

